Endocrine Abstracts

Aims: To determine the relationships between calcium:creatinine (CaCr) clearance ratio and fractional excretion of calcium (FECa).Design: Ten-week study of 15 patients aged 25–93 years undergoing investigations for parathyroid hormone (PTH)-related hypercalcaemia and 39 healthy volunteers aged 20–61 years.Outcome measures: CaCr clearance ratio calculated from 24-hour urine collection and FECa from 5 ml fasting urine aliqu...

Aims: To assess the short-term (one day) and longer-term (10–113 days) test-retest reliability of calcium:creatinine (Ca:Cr) ratio calculated from 24-hour urine collection and its surrogate fractional excretion of calcium (FECa) from urine aliquots.Methods: On the first visit, eight subjects (aged 22–55 years) collected two fasting urine aliquots (5 ml) at the start and end of their non-fasting 24-hour urine collection for FECa<...